#045CBF
Closest named color: Mid Blue (#276AB3). oklch(49.1% 0.172 257), rgb(4, 92, 191).
Aa
White text reads best on this color (6.38:1).
About this color
#045CBF is a medium-dark, vivid blue. In OKLCH its lightness is 49%, its chroma 0.172 and its hue 257°. Its hue sits on the cool side of the wheel. The nearest named color is Mid Blue (#276AB3), ΔE 0.050 away. White text reads best on it, at 6.38:1.
| Hue family | Blues |
| Lightness | medium-dark (49%) |
| Chroma | vivid (0.172) |
| Temperature | cool |
| Nearest name | Mid Blue (#276AB3) |
| Black text | 3.28:1 |
| White text | 6.38:1 |
Values
| HEX | #045CBF |
| RGB | rgb(4, 92, 191) |
| HSL | hsl(212, 96%, 38%) |
| OKLCH | oklch(49.1% 0.172 257) |
Contrast
WCAG 2 contrast ratios are the conformance target: AA needs 4.5:1 for body text and 3:1 for large text, AAA needs 7:1. APCA Lc values are supplementary guidance from the WCAG 3 drafts.
| Pair | WCAG 2 | Result | APCA | APCA guidance |
|---|---|---|---|---|
| White text on #045CBF | 6.38:1 | AA | Lc -86.1 | Fine for body text |
| Black text on #045CBF | 3.28:1 | AA large text | Lc 23.1 | Dividers and decoration only |
| #045CBF text on white | 6.38:1 | AA | Lc 81.0 | Fine for body text |
| #045CBF text on black | 3.28:1 | AA large text | Lc -20.9 | Dividers and decoration only |
Tints and shades
A 50–950 scale built in OKLCH: the hue is held, lightness follows a Tailwind v4-like curve, and every step is kept inside the sRGB gamut. This color sits at step 700.
-
Step 50
50
#F1F6FD
oklch(97.1% 0.011 256.7)
-
Step 100
100
#E0EBFA
oklch(93.6% 0.024 256.1)
-
Step 200
200
#C6DBF8
oklch(88.5% 0.046 256.5)
-
Step 300
300
#9FC3F6
oklch(80.9% 0.082 257.1)
-
Step 400
400
#69A2F2
oklch(70.7% 0.132 257)
-
Step 500
500
#3D88EE
oklch(63.1% 0.17 257.1)
-
Step 600
600
#166FDC
oklch(55.6% 0.185 257)
-
Step 700
700 (this color)
#045CBF
oklch(49.1% 0.172 257)
-
Step 800
800
#0B4C9B
oklch(42.8% 0.143 257)
-
Step 900
900
#14407B
oklch(37.7% 0.111 257.2)
-
Step 950
950
#0D2648
oklch(27% 0.07 257)
#045CBF with color blindness
Simulated with the Machado et al. (2009) model. ΔE is how far the color moves: below about 0.02 you would not notice a change.
| Vision | Seen as | Shift (ΔE) |
|---|---|---|
| Protanopia (no red cones) | #1267C3 | 0.031 |
| Deuteranopia (no green cones) | #0058BD | 0.011 |
| Tritanopia (no blue cones) | #007584 | 0.131 |
| Achromatopsia (no color) | #5F5F5F | 0.172 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #045CBF
#045CBF
oklch(49.1% 0.172 257)
- #815700
#815700
oklch(49% 0.103 76.4)
Analogous
Neighbouring hues, 30° either side.
Split complementary
The two hues beside the complement (150° and 210°).
Triadic
Three hues spaced 120° apart.
Palettes with this color
Curated palettes that contain a color within ΔE 0.04 (OKLab) of #045CBF, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Mid Blue #276AB3 ΔE 0.050
- Blue Blue #2242C7 ΔE 0.061
- Warm Blue #4B57DB ΔE 0.070
- French Blue #436BAD ΔE 0.071
- Azul #1D5DEC ΔE 0.071
- Royal Blue #4169E1 ΔE 0.077
- Denim Blue #3B5B92 ΔE 0.077
- Peacock Blue #016795 ΔE 0.079
Use #045CBF in your product
Turn it into light and dark UI roles checked for contrast, then export to Tailwind v4, shadcn/ui, CSS or design tokens.